The document discusses nature and geographical heritage in Australia. It provides a list of underwater and submarine places in Indonesia, including Bunaken Marine Park, Raja Ampat, Selat Pantar Marine Park, and Wakatobi National Park. It also mentions the Great Barrier Reef as a notable submarine location in Australia. The objectives are to identify interesting facts through a video, make predictions, develop a summary, and discuss what was learned about submarine places in Indonesia and Australia like the Great Barrier Reef.